You might try a valve kit that JD has, here is the link to the JD online parts site for that: John Deere Parts Catalog
Thanks for the reply. Unfortunately the kit listed on that page is for the spring "valves" that sit on top of the valve body (three tapped holes on top in first pic) and not the spools that actually control the flow of the hydraulic fluid. I've tried looking around to see if I could just buy replacement spools (2nd pic) and no one seems to carry them.You might try a valve kit that JD has, here is the link to the JD online parts site for that: John Deere Parts Catalog
I think I will have to end up taking it into a shop. Too bad . closest one is a 3hr drive.if it's the body, you may be able to have a machine shop clean it up a bit with a precision tool... whatever caused the damage - a burr, or piece of metal shaving etc - may only require some polishing to fix... with no material removal or machining per-se....
call a few hydraulics shops to see what they say... even if it takes them 2hrs to do (i would be surprised if it took that long), I can't see it costing more than $200.
As for the oil being "quite black"... well.... what can I say.... shame on you.
No U want this with the correct bore size. Not to tight and plenty of oil and slow back and forth. U can wrap crocus cloth on outside of hone to polish if need be. Hone has to have stones long enough to bridge the counterboreBrake cylinder hone sounds like it might work and I can recheck for burrs using a q-tip instead of trying to fit my pinky in there.
Do you think something like this would work Dave?
Thanks for all the info and suggestions everyone!